What should the air gap be between the reluctor and pickup?

I have been making good progress on the dizzy.

Points hole cut for the pickup wiring:

[IMG]http://i1130.photobucket.com/albums...-43B3ADFEB4DD-13442-0000161C9C9BA227.jpg[/IMG]

Shaft tac welded in:

[IMG]http://i1130.photobucket.com/albums...-EA43B876D99D-13442-0000161CA8FB9C12.jpg[/IMG]

Pickup in place with holes drilled and tapped:

[IMG]http://i1130.photobucket.com/albums...-EE1ED85380C8-13969-0000171C73FB0432.jpg[/IMG]

Reluctor and pickup installed and waiting to set the air gap between the two:

[IMG]http://i1130.photobucket.com/albums...-6B7D2DB29CEA-13969-0000171C53BA37F0.jpg[/IMG]


1959 Chevy Apache 3600

My rebuild album, including my reference shots:

http://s1130.photobucket.com/albums/m537/kjhibbs99/Apache%20Rebuild/